The global warming  that has already taken place may be even worse than we thought. That’s the takeaway from a new study that finds satellite measurements have likely been underestimating the warming of the lower levels of the atmosphere over the last 40 years. 

Basic physics equations govern the relationship between temperature and moisture in the air, but many measurements of temperature and moisture used in climate models diverge from this relationship, the new study finds. ..

More: livescience.com/satellites-underestimated-global-warming.html